It would cost JRiver several hundred thousand dollars to make a Mac version, so let's do this....
If, in the next 30 days, 100 people agree in this thread to order a Mac version, we'll set up a web page and take advance orders with a 50% deposit on a $60 retail price.
If, in the next 90 days, we can sell 4000 subscriptions, we'll start work. That's $120,000 in deposits.
If we can't finish within 6 months from the time we start, or if not enough people subscribe, we'll refund all the deposits.
[ EDIT by JimH -- not enough interest at this time -- closing this now ]